Deodorized compositions based on organothiophosphorus compounds

Abstract

Deodorized composition based on an organothiophosphorus compound. It contains an effective quantity of styrene as a deodorizer. Composition with insecticidal or nematocidal activity.

I claim: 
     
       1. Deodorised compositions based on organothiophosphorus compounds which contain organothiophosphorus compounds of the formula: ##STR2## in which: R 1  denotes a hydrogen atom, an alkyl radical containing from 1 to 8 carbon atoms, preferably from 1 to 4 carbon atoms, R 2  denotes an alkyl radical containing from 1 to 8 carbon atoms, preferably from 2 to 4 carbon atoms,   R 3  denotes an alkyl radical containing from 1 to 8 carbon atoms, preferably from 1 to 4 carbon atoms, optionally substituted by a halogen atom, a carbonamide group itself optionally substituted by at least one alkyl or alkylthio or alkoxycarbonyl or a phenyl radical, phenyl substituted by 1 to 3 substituents chosen from the group comprising a halogen atom, an alkyl containing from 1 to 4 carbon atoms, and the nitro and cyano group.   X, Y, Z and Z', which may be identical or different, denote an oxygen atom or a sulphur atom, with n being an integer equal to 0 or 1, Y being moreover capable of being a direct bond between R 1  and the phosphorus atom, and at least one of X, Y, Z and Z' necessarily being a sulphur atom, and an effective quantity of styrene as a deodoriser.   
     
     
       2. Composition according to claim 1, in which the styrene is present at a concentration of 5 to 50% by weight of the organothiophosphorus compound. 
     
     
       3. Composition according to claim 2, in which the styrene is present at a concentration of 5 to 40% by weight of the organothiophosphorus compound. 
     
     
       4. Composition according to claim 1, in which the organothiophosphorus compound is S,S-di-n-propyl O-ethyl phosphorodithioate. 
     
     
       5. Composition according to claim 1, which additionally contains a stabiliser of the organothiophosphorus compound. 
     
     
       6. Composition according to claim 1, which is in the form of a granulate. 
     
     
       7. Composition according to claim 1, which is in the form of an emulsifiable concentrate. 
     
     
       8. Process for the manufacture of a composition according to claim 1, which comprises the addition, during the preparation of the composition, of an effective quantity of styrene as a deodoriser. 
     
     
       9. Composition according to claim 1 in which the organothiophosphorus compound is S-(1,2-dicarbethoxy-ethyl) O,O-dimethyldithiophosphate.